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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v6 3/8] dm_op: convert HVMOP_track_dirty_vram
The handle type passed to the underlying shadow and hap functions is
changed for compatibility with the new hypercall buffer.
NOTE: This patch also modifies the type of the 'nr' parameter of
xc_hvm_track_dirty_vram() from uint64_t to uint32_t. In practice
the value passed was always truncated to 32 bits.
Suggested-by: Jan Beulich <jbeulich@xxxxxxxx>
Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>
Acked-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
Acked-by: Tim Deegan <tim@xxxxxxx>
Acked-by: Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
v4:
- Knock-on changes from compat code in dm.c. Not adding Jan's R-b since
the patch has fundamentally changed.
v3:
- Check d->max_vcpus rather than d->vcpu, as requested by Jan.
- The handle type changes (from uint8 to void) are still necessary, hence
omitting Jan's R-b until this is confirmed to be acceptable.
v2:
- Addressed several comments from Jan.
---
tools/flask/policy/modules/xen.if | 4 ++--
tools/libxc/include/xenctrl.h | 2 +-
tools/libxc/xc_misc.c | 32 +++++++++--------------------
xen/arch/x86/hvm/dm.c | 40 +++++++++++++++++++++++++++++++++++-
xen/arch/x86/hvm/hvm.c | 41 -------------------------------------
xen/arch/x86/mm/hap/hap.c | 2 +-
xen/arch/x86/mm/shadow/common.c | 2 +-
xen/include/asm-x86/hap.h | 2 +-
xen/include/asm-x86/shadow.h | 2 +-
xen/include/public/hvm/dm_op.h | 18 ++++++++++++++++
xen/include/public/hvm/hvm_op.h | 16 ---------------
xen/xsm/flask/hooks.c | 3 ---
xen/xsm/flask/policy/access_vectors | 2 --
13 files changed, 74 insertions(+), 92 deletions(-)
diff --git a/tools/flask/policy/modules/xen.if
b/tools/flask/policy/modules/xen.if
index f9254c2..45e5b5f 100644
--- a/tools/flask/policy/modules/xen.if
+++ b/tools/flask/policy/modules/xen.if
@@ -58,7 +58,7 @@ define(`create_domain_common', `
allow $1 $2:mmu { map_read map_write adjust memorymap physmap pinpage
mmuext_op updatemp };
allow $1 $2:grant setup;
allow $1 $2:hvm { cacheattr getparam hvmctl irqlevel pciroute sethvmc
- setparam pcilevel trackdirtyvram nested altp2mhvm
altp2mhvm_op send_irq };
+ setparam pcilevel nested altp2mhvm altp2mhvm_op
send_irq };
')
# create_domain(priv, target)
@@ -151,7 +151,7 @@ define(`device_model', `
allow $1 $2_target:domain { getdomaininfo shutdown };
allow $1 $2_target:mmu { map_read map_write adjust physmap target_hack
};
- allow $1 $2_target:hvm { getparam setparam trackdirtyvram hvmctl
irqlevel pciroute pcilevel cacheattr send_irq dm };
+ allow $1 $2_target:hvm { getparam setparam hvmctl irqlevel pciroute
pcilevel cacheattr send_irq dm };
')
# make_device_model(priv, dm_dom, hvm_dom)
diff --git a/tools/libxc/include/xenctrl.h b/tools/libxc/include/xenctrl.h
index 2ba46d7..c7ee412 100644
--- a/tools/libxc/include/xenctrl.h
+++ b/tools/libxc/include/xenctrl.h
@@ -1620,7 +1620,7 @@ int xc_hvm_inject_msi(
*/
int xc_hvm_track_dirty_vram(
xc_interface *xch, domid_t dom,
- uint64_t first_pfn, uint64_t nr,
+ uint64_t first_pfn, uint32_t nr,
unsigned long *bitmap);
/*
diff --git a/tools/libxc/xc_misc.c b/tools/libxc/xc_misc.c
index 06e90de..4c41d41 100644
--- a/tools/libxc/xc_misc.c
+++ b/tools/libxc/xc_misc.c
@@ -581,34 +581,22 @@ int xc_hvm_inject_msi(
int xc_hvm_track_dirty_vram(
xc_interface *xch, domid_t dom,
- uint64_t first_pfn, uint64_t nr,
+ uint64_t first_pfn, uint32_t nr,
unsigned long *dirty_bitmap)
{
- DECLARE_HYPERCALL_BOUNCE(dirty_bitmap, (nr+7) / 8,
XC_HYPERCALL_BUFFER_BOUNCE_OUT);
- DECLARE_HYPERCALL_BUFFER(struct xen_hvm_track_dirty_vram, arg);
- int rc;
+ struct xen_dm_op op;
+ struct xen_dm_op_track_dirty_vram *data;
- arg = xc_hypercall_buffer_alloc(xch, arg, sizeof(*arg));
- if ( arg == NULL || xc_hypercall_bounce_pre(xch, dirty_bitmap) )
- {
- PERROR("Could not bounce memory for xc_hvm_track_dirty_vram
hypercall");
- rc = -1;
- goto out;
- }
+ memset(&op, 0, sizeof(op));
- arg->domid = dom;
- arg->first_pfn = first_pfn;
- arg->nr = nr;
- set_xen_guest_handle(arg->dirty_bitmap, dirty_bitmap);
+ op.op = XEN_DMOP_track_dirty_vram;
+ data = &op.u.track_dirty_vram;
- rc = xencall2(xch->xcall, __HYPERVISOR_hvm_op,
- HVMOP_track_dirty_vram,
- HYPERCALL_BUFFER_AS_ARG(arg));
+ data->first_pfn = first_pfn;
+ data->nr = nr;
-out:
- xc_hypercall_buffer_free(xch, arg);
- xc_hypercall_bounce_post(xch, dirty_bitmap);
- return rc;
+ return do_dm_op(xch, dom, 2, &op, sizeof(op),
+ dirty_bitmap, (nr + 7) / 8);
}
int xc_hvm_modified_memory(
diff --git a/xen/arch/x86/hvm/dm.c b/xen/arch/x86/hvm/dm.c
index 72cb33a..b0908f4 100644
--- a/xen/arch/x86/hvm/dm.c
+++ b/xen/arch/x86/hvm/dm.c
@@ -18,7 +18,9 @@
#include <xen/hypercall.h>
#include <xen/sched.h>
+#include <asm/hap.h>
#include <asm/hvm/ioreq.h>
+#include <asm/shadow.h>
#include <xsm/xsm.h>
@@ -42,6 +44,26 @@ static bool copy_buf_to_guest(xen_dm_op_buf_t bufs[],
return !copy_to_guest(bufs[idx].h, src, bufs[idx].size);
}
+static int track_dirty_vram(struct domain *d, xen_pfn_t first_pfn,
+ unsigned int nr, struct xen_dm_op_buf *buf)
+{
+ if ( nr > (GB(1) >> PAGE_SHIFT) )
+ return -EINVAL;
+
+ if ( d->is_dying )
+ return -ESRCH;
+
+ if ( !d->max_vcpus || !d->vcpu[0] )
+ return -EINVAL;
+
+ if ( ((nr + 7) / 8) > buf->size )
+ return -EINVAL;
+
+ return shadow_mode_enabled(d) ?
+ shadow_track_dirty_vram(d, first_pfn, nr, buf->h) :
+ hap_track_dirty_vram(d, first_pfn, nr, buf->h);
+}
+
static int dm_op(domid_t domid,
unsigned int nr_bufs,
xen_dm_op_buf_t bufs[])
@@ -163,6 +185,22 @@ static int dm_op(domid_t domid,
break;
}
+ case XEN_DMOP_track_dirty_vram:
+ {
+ const struct xen_dm_op_track_dirty_vram *data =
+ &op.u.track_dirty_vram;
+
+ rc = -EINVAL;
+ if ( data->pad )
+ break;
+
+ if ( nr_bufs < 2 )
+ break;
+
+ rc = track_dirty_vram(d, data->first_pfn, data->nr, &bufs[1]);
+ break;
+ }
+
default:
rc = -EOPNOTSUPP;
break;
@@ -179,7 +217,7 @@ static int dm_op(domid_t domid,
return rc;
}
-#define MAX_NR_BUFS 1
+#define MAX_NR_BUFS 2
int compat_dm_op(domid_t domid,
unsigned int nr_bufs,
diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index fd0e18a..5a5b772 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -5134,47 +5134,6 @@ long do_hvm_op(unsigned long op,
XEN_GUEST_HANDLE_PARAM(void) arg)
rc = guest_handle_is_null(arg) ? hvmop_flush_tlb_all() : -EINVAL;
break;
- case HVMOP_track_dirty_vram:
- {
- struct xen_hvm_track_dirty_vram a;
- struct domain *d;
-
- if ( copy_from_guest(&a, arg, 1) )
- return -EFAULT;
-
- rc = rcu_lock_remote_domain_by_id(a.domid, &d);
- if ( rc != 0 )
- return rc;
-
- rc = -EINVAL;
- if ( !is_hvm_domain(d) )
- goto tdv_fail;
-
- if ( a.nr > GB(1) >> PAGE_SHIFT )
- goto tdv_fail;
-
- rc = xsm_hvm_control(XSM_DM_PRIV, d, op);
- if ( rc )
- goto tdv_fail;
-
- rc = -ESRCH;
- if ( d->is_dying )
- goto tdv_fail;
-
- rc = -EINVAL;
- if ( d->vcpu == NULL || d->vcpu[0] == NULL )
- goto tdv_fail;
-
- if ( shadow_mode_enabled(d) )
- rc = shadow_track_dirty_vram(d, a.first_pfn, a.nr, a.dirty_bitmap);
- else
- rc = hap_track_dirty_vram(d, a.first_pfn, a.nr, a.dirty_bitmap);
-
- tdv_fail:
- rcu_unlock_domain(d);
- break;
- }
-
case HVMOP_modified_memory:
{
struct xen_hvm_modified_memory a;
diff --git a/xen/arch/x86/mm/hap/hap.c b/xen/arch/x86/mm/hap/hap.c
index e6dc088..6dbb3cc 100644
--- a/xen/arch/x86/mm/hap/hap.c
+++ b/xen/arch/x86/mm/hap/hap.c
@@ -68,7 +68,7 @@
int hap_track_dirty_vram(struct domain *d,
unsigned long begin_pfn,
unsigned long nr,
- XEN_GUEST_HANDLE_64(uint8) guest_dirty_bitmap)
+ XEN_GUEST_HANDLE_PARAM(void) guest_dirty_bitmap)
{
long rc = 0;
struct sh_dirty_vram *dirty_vram;
diff --git a/xen/arch/x86/mm/shadow/common.c b/xen/arch/x86/mm/shadow/common.c
index 4113351..0079238 100644
--- a/xen/arch/x86/mm/shadow/common.c
+++ b/xen/arch/x86/mm/shadow/common.c
@@ -3604,7 +3604,7 @@ static void sh_clean_dirty_bitmap(struct domain *d)
int shadow_track_dirty_vram(struct domain *d,
unsigned long begin_pfn,
unsigned long nr,
- XEN_GUEST_HANDLE_64(uint8) guest_dirty_bitmap)
+ XEN_GUEST_HANDLE_PARAM(void) guest_dirty_bitmap)
{
int rc = 0;
unsigned long end_pfn = begin_pfn + nr;
diff --git a/xen/include/asm-x86/hap.h b/xen/include/asm-x86/hap.h
index dedb4b1..88587c4 100644
--- a/xen/include/asm-x86/hap.h
+++ b/xen/include/asm-x86/hap.h
@@ -43,7 +43,7 @@ void hap_vcpu_init(struct vcpu *v);
int hap_track_dirty_vram(struct domain *d,
unsigned long begin_pfn,
unsigned long nr,
- XEN_GUEST_HANDLE_64(uint8) dirty_bitmap);
+ XEN_GUEST_HANDLE_PARAM(void) dirty_bitmap);
extern const struct paging_mode *hap_paging_get_mode(struct vcpu *);
int hap_set_allocation(struct domain *d, unsigned int pages, bool *preempted);
diff --git a/xen/include/asm-x86/shadow.h b/xen/include/asm-x86/shadow.h
index bac952f..7e1ed3b 100644
--- a/xen/include/asm-x86/shadow.h
+++ b/xen/include/asm-x86/shadow.h
@@ -63,7 +63,7 @@ int shadow_enable(struct domain *d, u32 mode);
int shadow_track_dirty_vram(struct domain *d,
unsigned long first_pfn,
unsigned long nr,
- XEN_GUEST_HANDLE_64(uint8) dirty_bitmap);
+ XEN_GUEST_HANDLE_PARAM(void) dirty_bitmap);
/* Handler for shadow control ops: operations from user-space to enable
* and disable ephemeral shadow modes (test mode and log-dirty mode) and
diff --git a/xen/include/public/hvm/dm_op.h b/xen/include/public/hvm/dm_op.h
index 980322f..5b8b0b4 100644
--- a/xen/include/public/hvm/dm_op.h
+++ b/xen/include/public/hvm/dm_op.h
@@ -176,6 +176,23 @@ struct xen_dm_op_destroy_ioreq_server {
uint16_t pad;
};
+/*
+ * XEN_DMOP_track_dirty_vram: Track modifications to the specified pfn
+ * range.
+ *
+ * NOTE: The bitmap passed back to the caller is passed in a
+ * secondary buffer.
+ */
+#define XEN_DMOP_track_dirty_vram 7
+
+struct xen_dm_op_track_dirty_vram {
+ /* IN - number of pages to be tracked */
+ uint32_t nr;
+ uint32_t pad;
+ /* IN - first pfn to track */
+ uint64_aligned_t first_pfn;
+};
+
struct xen_dm_op {
uint32_t op;
uint32_t pad;
@@ -186,6 +203,7 @@ struct xen_dm_op {
struct xen_dm_op_ioreq_server_range unmap_io_range_from_ioreq_server;
struct xen_dm_op_set_ioreq_server_state set_ioreq_server_state;
struct xen_dm_op_destroy_ioreq_server destroy_ioreq_server;
+ struct xen_dm_op_track_dirty_vram track_dirty_vram;
} u;
};
diff --git a/xen/include/public/hvm/hvm_op.h b/xen/include/public/hvm/hvm_op.h
index 6fcd86d..47e836c 100644
--- a/xen/include/public/hvm/hvm_op.h
+++ b/xen/include/public/hvm/hvm_op.h
@@ -95,22 +95,6 @@ typedef enum {
/* Following tools-only interfaces may change in future. */
#if defined(__XEN__) || defined(__XEN_TOOLS__)
-/* Track dirty VRAM. */
-#define HVMOP_track_dirty_vram 6
-struct xen_hvm_track_dirty_vram {
- /* Domain to be tracked. */
- domid_t domid;
- /* Number of pages to track. */
- uint32_t nr;
- /* First pfn to track. */
- uint64_aligned_t first_pfn;
- /* OUT variable. */
- /* Dirty bitmap buffer. */
- XEN_GUEST_HANDLE_64(uint8) dirty_bitmap;
-};
-typedef struct xen_hvm_track_dirty_vram xen_hvm_track_dirty_vram_t;
-DEFINE_XEN_GUEST_HANDLE(xen_hvm_track_dirty_vram_t);
-
/* Notify that some pages got modified by the Device Model. */
#define HVMOP_modified_memory 7
struct xen_hvm_modified_memory {
diff --git a/xen/xsm/flask/hooks.c b/xen/xsm/flask/hooks.c
index 1ce8a36..a4272d7 100644
--- a/xen/xsm/flask/hooks.c
+++ b/xen/xsm/flask/hooks.c
@@ -1180,9 +1180,6 @@ static int flask_hvm_param(struct domain *d, unsigned
long op)
case HVMOP_get_param:
perm = HVM__GETPARAM;
break;
- case HVMOP_track_dirty_vram:
- perm = HVM__TRACKDIRTYVRAM;
- break;
default:
perm = HVM__HVMCTL;
}
diff --git a/xen/xsm/flask/policy/access_vectors
b/xen/xsm/flask/policy/access_vectors
index 92e6da9..47ce589 100644
--- a/xen/xsm/flask/policy/access_vectors
+++ b/xen/xsm/flask/policy/access_vectors
@@ -268,8 +268,6 @@ class hvm
bind_irq
# XEN_DOMCTL_pin_mem_cacheattr
cacheattr
-# HVMOP_track_dirty_vram
- trackdirtyvram
# HVMOP_modified_memory, HVMOP_get_mem_type, HVMOP_set_mem_type,
# HVMOP_set_mem_access, HVMOP_get_mem_access, HVMOP_pagetable_dying,
# HVMOP_inject_trap
--
2.1.4
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